There were 15 French citizens aboard the flight, and France has offered to help Greek and Egyptian forces who are currently searching for the rubble in seas south of the Greek island of Karpathos.

The plane was 37,000 feet above the ground and about 10 miles into Egyptian air space, the airline announced on Twitter today. As it entered the Egyptian air space, it swerved “90 degrees left and 360 degrees to the right” then plunged, according to Greece’s Defence Minister Panos Kammenos.